Maintenance, storage and disposal
R&S
®
ZNB/ZNBT
1535
User Manual 1173.9163.02 ─ 62
11
Maintenance, storage and disposal
The product does not require regular maintenance. It only requires occasional clean-
ing. It is however advisable to check the nominal data from time to time.
11.1
Replacing fuses
The R&S
ZNBT is protected by a time lag fuse (T15L250V, stock no. 3589.7478.00).
The fuse is screwed in below the AC power switch on the rear panel.
For the R&S
ZNB, each of the optional "Bias Tee" inputs at the rear panel (labeled
PORT BIAS <no>) is protected by a fuse (0.250 A, F IEC60127-2/2, stock no.
0020.7246.00).
To replace the mains fuse (R&S
ZNBT only)
Risk of electric shock
The fuse is part of the main power supply. Therefore, handling the fuse while power is
on can lead to electric shock. Before opening the fuse holder, make sure that the
instrument is switched off and disconnected from all power supplies.
Always use fuses supplied by Rohde
&
Schwarz as spare parts, or fuses of the same
type and rating.
1. Unscrew the fuse holder from the rear panel and pull the fuse holder out of the slot.
2. Pull the fuse out of the fuse holder and replace it by a new one.
3. Stick the fuse holder back into the slot in the rear panel and screw it tight.
To replace the PORT BIAS input fuses (R&S
ZNB only)
► Open the fuse holder by slightly turning the lid counterclockwise.
11.2
Cleaning
How to clean the product is described in
Do not use any liquids for cleaning. Cleaning agents, solvents, acids and bases can
damage the front panel labeling, plastic parts and display.
Cleaning